Centrifugal pulverizing mill



Feb. 27, 1923: 1,446,765.

E. ODAM CENTRIFUGAL PULVERIZING MILL Filed July 8, 1919 munmumm br a Patented Feb. 2?, 1923.

- EUGENE ODAM, orraitisrnnivcn I .1

CENTBIFUGAL PULvER-rzr'ne MIIlL Q To all whom it may concern:

Be it known that I, EUGENE ODAM, a citizen of the Republic of France, residing at 131 Rue drivron, Paris, France, have in vented a new and useful Centrifugal Pulverizing Mill; and I do hereby declare that the following is a full, clear, and exact de scription of the invention, which will enable others skilled in the art to which it-appertains to make and use the same.

This invention relates to an apparatus which effects the reduction'to powder of granulated materials by acting upon them between balls having a rolling movementin suitable paths or races. V

According to the invention I advantageously employ a ball grinding mill in which the granulated material to be pulverized in a cold state is introduced at the centre and caused to move outwardly under centrifugal force, thereby producing a con-' stant flow of the said material which is pulverized in its passage between the'balls and the channels or races in which'they run.

To enable the invention to be understood I will describe the same by reference to the of slight inclination which facilitates the v flow of the said substances.

This flow is effected by turnin one of the plates, for example the plate a, 1n the direction of the arrow 7 (Figure 2). The substances within the circular space 6 are directed slowly towards the periphery and consequently pass between the balls 7 and the channels or races in which they run where they are subjected to a suitable pressure and crushed and whence they pass to the periphery g.

In the complete construction shown in Figure 3 the substances operated on are Application filed July 8, 1919., :Serial No. 309,474;

caused to pass into successive superposed ball races mounted on a vertical shaft.

In Figure 3 h indicates the first compartment into which are introduced through the opening a" the substances tobe pulverized which follow the path indicated by the ar use rows f and pass to the first set of balls if, I

on leaving which they follow the path indicated by. thearrowsf into the second compartment k whence they pass to the second set of balls a on leavin which they pass into a conduit 41 whence they' travel to the inlet opening of a third compartment such as h The number of superi posed chambers employed may be varied according to the treatment to be effected.

I The bottoms of these different compartments are ofa funnel-like form being equivalents of the form of reservoir h shown in Figs. 1 and 2 and are traversed centrallyby a vertical shaft pwhich communicates movement to a number of ball grinding devices. In the grinding device a the lower part-is actuated by a key o upon which it slides I with slight frictional contact. In the second grinding device 1%, the upper part is actuated by a cross piece r driven in the same i V manner asthe first named device. The two free parts are held apart by a spring 8 which thus exerts an equal pressure upon both grinding devices. f l

In each embodiment of the invention a charge of material to be ground is held in an upright receiver or reservoir, so that r its weight feeds it downward. within the circle of balls and outwardly to enter between the balls and the channels or races.

-Whether this reservoir is stationary or rotative', itholds whatmay aptly be designated as a static charge of the material to be ground.

It will be obvious that the devices described may include all the accessories generally known and employed therewith, particularly mean-s for lubricating the moving parts. 7

It should be further understood that the arrangements describedare shown by way of example onlyjan'd may be varied without de arting from the scope of the invention.

laims: V r

1. A centrifugalball mill, comprising a vertical shaft and two rings of balls, with stationary race members above the. upper balls and below the lower balls and revolving race members having rotative engagement with said shaft, and a spring pressing said revolving members in contrary directions against their respective balls.

2. A mill according to claim 1, the casing 'havlng a conical guiding portion for receiving' the materialdischarged centrifugally from the upper ring of balls and directing it centrally through the lower race member to feed balis.

Witneses. i V V EUGENE ODAM.

"Witness: V

' CHAS. P. PRESSLY. 

